AOC model Optimization

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

@Deep

we are reducing mass of pitman arm so my question is what is the difference between mass and mass fraction, volume and volume fraction??
 

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited April 2017

    Kunal,

     

    Volumefrac / MassFrac response is the material fraction of the designable material volume.

     

    Volume / Mass response is the total volume, which includes design and non-design volume.

     

     

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited April 2017

    Krunal,

     

    Both the terms actually describes fraction of initial design space in topology optimization. Both are global responses with the range 0.0 to 1.0.

    Mass fraction includes non-design space in fraction calculation whereas volume fraction only considers design space.

     

    Please have a look into the image for reference.

     

    (Image Courtesy: http://www.altairhyperworks.in/product/OptiStruct)

    Courtesy: Typical optimization process on VW compressor bracket

    <?xml version="1.0" encoding="UTF-8"?>optistruct-overview-VW_Compressor_Bracket_Results-726x383.jpg

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